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2 years ago

13

Who or what has had the biggest influence on your thoughts about chemistry?

1 answer:

vampirchik [111]2 years ago

3 0

Answer:

My chemistry teacher from my sophomore year.

Explanation:

I took class online last year and he was an older teacher and really didn't know how to use a computer. I asked for help multiple times and he would tell me to look the answer up. I would watch countless videos and still wouldn't understand. He ended up failing me that year and I had summer school. To this day, I dislike chemistry because of him.

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12. What is the mass number of an atom that has 4 protons, 4 electrons, and 5 neutrons?

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Answer:

9

Explanation:

mass number = protons + neutrons

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3 years ago

What is a ribosome?

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2 years ago

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If a student calculated 0.03256 moles of copper metal (Cu0), how many grams of copper metal (Cu0) should be recovered at the end

Liula [17]

Answer:

Mass of copper metal will be 2.06756 gram

Explanation:

We have given number of moles of copper n = 0.03256

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We have to calculate mass of copper metals in gram

We know that number of moles is given by $number\ of\ moles=\frac{mass\ in\ gram}{molar\ mass}$

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Mass in gram = 2.06756 gram

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2 years ago

What is the molar mass of sodium bicarbonate, NaHCO3.

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2 years ago

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TIMED HELP PLSPLS ASAP UNDER 5 MIN REMAINING

uysha [10]

Answer:

3.98×10⁻¹⁹ J

Explanation:

Applying,

E = hf................. Equation 1

Where E = energy of the photon, h = planck's constant, f = frequency of the photon

From the question,

Given: f = 6.00×10¹⁴ Hz

Constant: h = 6.626×10⁻³⁴J.s

Substitute these values into equation 1

E = (6.00×10¹⁴)(6.626×10⁻³⁴)

E = 39.756×10⁻²⁰

E = 3.98×10⁻¹⁹ J

Hence the energy of the photon in joules is 3.98×10⁻¹⁹ J

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2 years ago